Find the correct from the followings.

Biology Biological Classification Skill Builder Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

T.O. Diener discovered a new infectious agent, smaller than virus and named them as prions.

Viroids lack the protein coat and made of only free RNA

The RNA of viroids is of high molecular weight

Lichens are very good pollution indicators as they grow only in polluted areas.

Text Solution

Verified by Experts

The correct answer is:

Viroids are smaller than viruses and consist solely of a short strand of circular, single-stranded free RNA.

• Unlike viruses, they lack a protein coat (capsid).

• They were discovered by T.O. Diener in 1971 while investigating potato spindle tuber disease.

Previous Question Next Question

Get practice questions, solutions, and test series in one place.

Share your experience with this question and solution.

Send your comment, doubt, correction, or feedback to admin.

What students say about this solution

No reviews yet. Be the first to write a review.